How to make a timing tape
(This sounds more complicated than it really is. Good luck.) |
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'''2.''' You find TDC by using a piston stop and fabricate a timing "tab" (often a stiff piece of wire secured behind a convenient bolt) that aligns with the line on the damper to represent "0" or TDC. | '''2.''' You find TDC by using a piston stop and fabricate a timing "tab" (often a stiff piece of wire secured behind a convenient bolt) that aligns with the line on the damper to represent "0" or TDC. | ||
| − | Once TDC | + | Once TDC has been established, the rest goes like this: |
Using either a string, ruler or a seamstress' cloth tape measure, measure the circumference of the damper. If you only have a straight ruler, measure the diameter and multiply by 3.1416 (pi) to get the circumference. | Using either a string, ruler or a seamstress' cloth tape measure, measure the circumference of the damper. If you only have a straight ruler, measure the diameter and multiply by 3.1416 (pi) to get the circumference. | ||
| − | Once the circumference is known, 1/10 of this figure represents 36 degrees. Half of that is 18 | + | Once the circumference is known, 1/10 (10%) of this figure represents 36 degrees. Half of that is 18 degrees, half again is 9 degrees, etc. It doesn't matter what units you use- metric, inch, or nanoparsec's. |
When marking your home-made tape, starting from "0", BTDC will be to the right, ATDC to the left of "0". | When marking your home-made tape, starting from "0", BTDC will be to the right, ATDC to the left of "0". | ||
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They cost more than a standard light, but if you plan on tuning engines beyond the basics, it will pay for itself in the long run, IMHO. | They cost more than a standard light, but if you plan on tuning engines beyond the basics, it will pay for itself in the long run, IMHO. | ||
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